Base64 Encoder/Decoder - Online Base64 Tool

Free online Base64 encoder and decoder. Convert text, files, and images to/from Base64 instantly. No upload needed — all processing is local.

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Original Text

Base64 Encoded Result

Operation Mode

Instructions

  • EncodeConvert plain text to Base64 format
  • DecodeRestore Base64 text to original content
  • Supports uploading text files for encoding/decoding
  • Supports Chinese and other Unicode characters
  • Copy or download processed results

What is Base64 Encoder/Decoder?

Base64 encoding is a method to convert binary data (like images or files) into ASCII text format using 64 printable characters (A-Z, a-z, 0-9, +, /). It's commonly used for sending data over text-based protocols like email, JSON, or HTTP headers.

How to Encode/Decode Base64

  1. 1Enter your text in the input field (or upload a text file).
  2. 2Select "Encode" to convert text to Base64, or "Decode" to convert Base64 back to text.
  3. 3Click "Copy" to copy the result, or "Download" to save as a file.

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